#include<stdio.h>
#include<stdlib.h>
int main(void)
{
	int i;
	char s[100]="";
	gets(s);
	for(i=0;s[i]!='\0';i++)
	{
		if((s[i]<='z'&&s[i]>='a')||(s[i]<='Z'&&s[i]>='A')||(s[i]<='9'&&s[i]>='0'))
		{
			s[i]=s[i]+2;
			if((s[i]>'z'&&s[i]<('z'+3))||(s[i]>'Z'&&s[i]<('Z'+3)))
			{
				s[i]=s[i]-26; 
			}
			else if(s[i]>'9'&&s[i]<('9'+4))
			{
				s[i]=s[i]-9;
			}
			printf("%c",s[i]);
		}
		else
			{
				printf("it's a illegal string"); 
				break; 
			} 
	}
	return 0;
}
